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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: SchemaItem.html 842 2015-03-07 18:20:42Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.core;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>/**<a name="line.10"></a>
<span class="sourceLineNo">011</span> * Superclass for the {@link ObjType} and {@link Field} classes which make up a {@link Schema} version.<a name="line.11"></a>
<span class="sourceLineNo">012</span> *<a name="line.12"></a>
<span class="sourceLineNo">013</span> * &lt;p&gt;<a name="line.13"></a>
<span class="sourceLineNo">014</span> * Instances have a {@linkplain #getStorageId storage ID} which must be unique across the {@link Schema} version.<a name="line.14"></a>
<span class="sourceLineNo">015</span> * Instances also have a {@linkplain #getName name} which must be a {@linkplain #NAME_PATTERN valid Java identifier}.<a name="line.15"></a>
<span class="sourceLineNo">016</span> * Instances are also associated with a {@linkplain #getSchema specific} {@link Schema}.<a name="line.16"></a>
<span class="sourceLineNo">017</span> * &lt;/p&gt;<a name="line.17"></a>
<span class="sourceLineNo">018</span> */<a name="line.18"></a>
<span class="sourceLineNo">019</span>public abstract class SchemaItem {<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>    /**<a name="line.21"></a>
<span class="sourceLineNo">022</span>     * The regular expression that all {@link SchemaItem} names must match. This pattern is the same as is required<a name="line.22"></a>
<span class="sourceLineNo">023</span>     * for Java identifiers.<a name="line.23"></a>
<span class="sourceLineNo">024</span>     */<a name="line.24"></a>
<span class="sourceLineNo">025</span>    public static final String NAME_PATTERN = "\\p{javaJavaIdentifierStart}\\p{javaJavaIdentifierPart}*";<a name="line.25"></a>
<span class="sourceLineNo">026</span><a name="line.26"></a>
<span class="sourceLineNo">027</span>    final String name;<a name="line.27"></a>
<span class="sourceLineNo">028</span>    final int storageId;<a name="line.28"></a>
<span class="sourceLineNo">029</span>    final Schema schema;<a name="line.29"></a>
<span class="sourceLineNo">030</span><a name="line.30"></a>
<span class="sourceLineNo">031</span>    SchemaItem(String name, int storageId, Schema schema) {<a name="line.31"></a>
<span class="sourceLineNo">032</span>        if (name == null)<a name="line.32"></a>
<span class="sourceLineNo">033</span>            throw new IllegalArgumentException("invalid null name");<a name="line.33"></a>
<span class="sourceLineNo">034</span>        if (!name.matches(NAME_PATTERN))<a name="line.34"></a>
<span class="sourceLineNo">035</span>            throw new IllegalArgumentException("invalid name `" + name + "'");<a name="line.35"></a>
<span class="sourceLineNo">036</span>        if (storageId &lt;= 0)<a name="line.36"></a>
<span class="sourceLineNo">037</span>            throw new IllegalArgumentException("invalid storageId " + storageId);<a name="line.37"></a>
<span class="sourceLineNo">038</span>        if (schema == null)<a name="line.38"></a>
<span class="sourceLineNo">039</span>            throw new IllegalArgumentException("null schema");<a name="line.39"></a>
<span class="sourceLineNo">040</span>        this.name = name;<a name="line.40"></a>
<span class="sourceLineNo">041</span>        this.storageId = storageId;<a name="line.41"></a>
<span class="sourceLineNo">042</span>        this.schema = schema;<a name="line.42"></a>
<span class="sourceLineNo">043</span>    }<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span>    /**<a name="line.45"></a>
<span class="sourceLineNo">046</span>     * Get the associated with this instance.<a name="line.46"></a>
<span class="sourceLineNo">047</span>     *<a name="line.47"></a>
<span class="sourceLineNo">048</span>     * @return name of this object type or field, never null<a name="line.48"></a>
<span class="sourceLineNo">049</span>     */<a name="line.49"></a>
<span class="sourceLineNo">050</span>    public String getName() {<a name="line.50"></a>
<span class="sourceLineNo">051</span>        return this.name;<a name="line.51"></a>
<span class="sourceLineNo">052</span>    }<a name="line.52"></a>
<span class="sourceLineNo">053</span><a name="line.53"></a>
<span class="sourceLineNo">054</span>    /**<a name="line.54"></a>
<span class="sourceLineNo">055</span>     * Get the storage ID associated with this instance.<a name="line.55"></a>
<span class="sourceLineNo">056</span>     *<a name="line.56"></a>
<span class="sourceLineNo">057</span>     * @return storage ID, always greater than zero<a name="line.57"></a>
<span class="sourceLineNo">058</span>     */<a name="line.58"></a>
<span class="sourceLineNo">059</span>    public int getStorageId() {<a name="line.59"></a>
<span class="sourceLineNo">060</span>        return this.storageId;<a name="line.60"></a>
<span class="sourceLineNo">061</span>    }<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span>    /**<a name="line.63"></a>
<span class="sourceLineNo">064</span>     * Get the schema version with which this instance is associated.<a name="line.64"></a>
<span class="sourceLineNo">065</span>     *<a name="line.65"></a>
<span class="sourceLineNo">066</span>     * @return associated schema version<a name="line.66"></a>
<span class="sourceLineNo">067</span>     */<a name="line.67"></a>
<span class="sourceLineNo">068</span>    public Schema getSchema() {<a name="line.68"></a>
<span class="sourceLineNo">069</span>        return this.schema;<a name="line.69"></a>
<span class="sourceLineNo">070</span>    }<a name="line.70"></a>
<span class="sourceLineNo">071</span><a name="line.71"></a>
<span class="sourceLineNo">072</span>    /**<a name="line.72"></a>
<span class="sourceLineNo">073</span>     * Create corresponding {@link StorageInfo} object.<a name="line.73"></a>
<span class="sourceLineNo">074</span>     */<a name="line.74"></a>
<span class="sourceLineNo">075</span>    abstract StorageInfo toStorageInfo();<a name="line.75"></a>
<span class="sourceLineNo">076</span><a name="line.76"></a>
<span class="sourceLineNo">077</span>    @Override<a name="line.77"></a>
<span class="sourceLineNo">078</span>    public abstract String toString();<a name="line.78"></a>
<span class="sourceLineNo">079</span><a name="line.79"></a>
<span class="sourceLineNo">080</span>    static Class&lt;? extends FieldStorageInfo&gt; infoTypeFor(Class&lt;? extends Field&lt;?&gt;&gt; type) {<a name="line.80"></a>
<span class="sourceLineNo">081</span>        if (ReferenceField.class.isAssignableFrom(type))<a name="line.81"></a>
<span class="sourceLineNo">082</span>            return ReferenceFieldStorageInfo.class;<a name="line.82"></a>
<span class="sourceLineNo">083</span>        if (SimpleField.class.isAssignableFrom(type))<a name="line.83"></a>
<span class="sourceLineNo">084</span>            return SimpleFieldStorageInfo.class;<a name="line.84"></a>
<span class="sourceLineNo">085</span>        if (MapField.class.isAssignableFrom(type))<a name="line.85"></a>
<span class="sourceLineNo">086</span>            return MapFieldStorageInfo.class;<a name="line.86"></a>
<span class="sourceLineNo">087</span>        if (ListField.class.isAssignableFrom(type))<a name="line.87"></a>
<span class="sourceLineNo">088</span>            return ListFieldStorageInfo.class;<a name="line.88"></a>
<span class="sourceLineNo">089</span>        if (SetField.class.isAssignableFrom(type))<a name="line.89"></a>
<span class="sourceLineNo">090</span>            return SetFieldStorageInfo.class;<a name="line.90"></a>
<span class="sourceLineNo">091</span>        throw new IllegalArgumentException("no StorageInfo type known for " + type);<a name="line.91"></a>
<span class="sourceLineNo">092</span>    }<a name="line.92"></a>
<span class="sourceLineNo">093</span>}<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>




























































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